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author | Arjun Shankar <arjun@redhat.com> | 2024-10-18 16:03:25 +0200 |
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committer | Arjun Shankar <arjun@redhat.com> | 2024-10-23 13:40:16 +0200 |
commit | 9f0d2c0ee6c728643fcf9a4879e9f20f5e45ce5f (patch) | |
tree | 86cff8d63944f5a0e573b1d0a72d3a669c4f124d /sysdeps/unix/sysv/linux/ia64/Versions | |
parent | 81439a116cf48583127ddf1f09809440aa40969a (diff) | |
download | glibc-master.tar.gz glibc-master.tar.xz glibc-master.zip |
popen modifies its file handler book-keeping under a lock that wasn't being taken during fork. This meant that a concurrent popen and fork could end up copying the lock in a "locked" state into the fork child, where subsequently calling popen would lead to a deadlock due to the already (spuriously) held lock. This commit fixes the deadlock by appropriately taking the lock before fork, and releasing/resetting it in the parent/child after the fork. A new test for concurrent popen and fork is also added. It consistently hangs (and therefore fails via timeout) without the fix applied. Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/ia64/Versions')
0 files changed, 0 insertions, 0 deletions